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1.
Generally, the semiclosed-form option pricing formula for complex financial models depends on unobservable factors such as stochastic volatility and jump intensity. A popular practice is to use an estimate of these latent factors to compute the option price. However, in many situations this plug-and-play approximation does not yield the appropriate price. This article examines this bias and quantifies its impacts. We decompose the bias into terms that are related to the bias on the unobservable factors and to the precision of their point estimators. The approximated price is found to be highly biased when only the history of the stock price is used to recover the latent states. This bias is corrected when option prices are added to the sample used to recover the states' best estimate. We also show numerically that such a bias is propagated on calibrated parameters, leading to erroneous values. The Canadian Journal of Statistics 48: 8–35; 2020 © 2019 Statistical Society of Canada 相似文献
2.
提出了一种内核级并发消息通信机制。该机制采用对象传送协议和动态线程池技术,并通过会话控制完成数据的收发过程,将线程池设计为二级阻塞队列来暂缓线程的撤销过程,从而保证既能够快速响应客户请求,又可减少因频繁创建和撤销线程而消耗系统的资源和时间,为分布式操作系统提供了高效可靠的通信服务。 相似文献
3.
Herein, we propose a data-driven test that assesses the lack of fit of nonlinear regression models. The comparison of local linear kernel and parametric fits is the basis of this test, and specific boundary-corrected kernels are not needed at the boundary when local linear fitting is used. Under the parametric null model, the asymptotically optimal bandwidth can be used for bandwidth selection. This selection method leads to the data-driven test that has a limiting normal distribution under the null hypothesis and is consistent against any fixed alternative. The finite-sample property of the proposed data-driven test is illustrated, and the power of the test is compared with that of some existing tests via simulation studies. We illustrate the practicality of the proposed test by using two data sets. 相似文献
4.
CHIN-TSANG CHIANG MEI-CHENG WANG CHIUNG-YU HUANG 《Scandinavian Journal of Statistics》2005,32(1):77-91
Abstract. Recurrent event data are largely characterized by the rate function but smoothing techniques for estimating the rate function have never been rigorously developed or studied in statistical literature. This paper considers the moment and least squares methods for estimating the rate function from recurrent event data. With an independent censoring assumption on the recurrent event process, we study statistical properties of the proposed estimators and propose bootstrap procedures for the bandwidth selection and for the approximation of confidence intervals in the estimation of the occurrence rate function. It is identified that the moment method without resmoothing via a smaller bandwidth will produce a curve with nicks occurring at the censoring times, whereas there is no such problem with the least squares method. Furthermore, the asymptotic variance of the least squares estimator is shown to be smaller under regularity conditions. However, in the implementation of the bootstrap procedures, the moment method is computationally more efficient than the least squares method because the former approach uses condensed bootstrap data. The performance of the proposed procedures is studied through Monte Carlo simulations and an epidemiological example on intravenous drug users. 相似文献
5.
欧鹏 《华中农业大学学报(社会科学版)》2007,(4):67-71
医疗机构医疗服务定价需要考虑因素是医疗卫生行业管理的一个重要内容,合理有效定价对实现社会公平和福利分配,保障居民生命健康、促进社会稳定的具有重要的现实意义。本文对国内外医疗定价的几种主要模式进行简要介绍,然后分析一下我国现行医疗服务定价存在问题的原因,并给出几点改革建议,讨论需要建立一个合理的定价体系和监管体系需要考虑因素。 相似文献
6.
A Semi-parametric Regression Model with Errors in Variables 总被引:4,自引:0,他引:4
Abstract. In this paper, we consider a partial linear regression model with measurement errors in possibly all the variables. We use a method of moments and deconvolution to construct a new class of parametric estimators together with a non-parametric kernel estimator. Strong convergence, optimal rate of weak convergence and asymptotic normality of the estimators are investigated. 相似文献
7.
Jianqing Fan 《Revue canadienne de statistique》1992,20(2):155-169
Nonparametric deconvolution problems require one to recover an unknown density when the data are contaminated with errors. Optimal global rates of convergence are found under the weighted Lp-loss (1 ≤ p ≤ ∞). It appears that the optimal rates of convergence are extremely low for supersmooth error distributions. To resolve this difficulty, we examine how high the noise level can be for deconvolution to be feasible, and for the deconvolution estimate to be as good as the ordinary density estimate. It is shown that if the noise level is not too high, nonparametric Gaussian deconvolution can still be practical. Several simulation studies are also presented. 相似文献
8.
国际转移定价及其税务规制研究 总被引:3,自引:0,他引:3
李巧巧 《江汉大学学报(人文科学版)》2004,23(3):28-31
我国加入WTO后,跨国公司大举进军中国市场,国际转移定价滥用问题日益突出。我国应该采取措施,强化转移定价滥用行为监督管理意识,完善转移定价税制,建立和健全审计制度,改善监管手段,同时加强国际合作,加大对转移定价滥用行为的监管和惩处力度。 相似文献
9.
本文首先从分析影响企业定价的市场结构入手 ,研究了处于不同市场结构环境中的企业定价战略 ,继而结合案例分析了不同市场结构的企业定价策略和技巧 ,特别是给出了几种实用的定量定价方法。在研究各种定价策略的基础上 ,提出了一个实用有效的定价程序。此外 ,本文还用博弈论的观点重点分析了寡头垄断市场的定价策略 相似文献
10.